Proof



aura fine notes,

CHARLES TOIPPAN, OF WAKEFIELD, MASSACHUSETTS.

Letters Patent No. 89,094, dated April 20, 1869.

lMPROVED MODE OFTREATING PAPER AND OTHER FABRICS TO RENBER THEM WATER PROOF.

The schedule referred to in these Letters Patent and malnng part of the same.

field, in the county of Middlesex and State of Massa--.

chusetts, have invented a new and useful Mode of Treating Paper and other Fabrics, to render them \v ater-proqf; and I hereby declare that the following is a full and exact description thereof.

My invention consists in preparing paper, cloth, felting, or textile fabrics of. any kind, cork, sponge, leather, and other similar porous substances, and air ticles made thereof, especially wrapping-paper, bankenvelopes, paper collars, garments, gloves, hats, 1nnbrella-coverings, labels, tags, 850., so as'to render the same impervious to water, by applying thereto paiaiiinc dissolved in naphtha, benzine, or other suitable solvents.

To enable others skilledin the art to understand and use my invention, I will proceed to describe the manner in which I have carried it out.

I prepare a solution of paraiiine by dissolving paralline in pure naphtha, that is, naphtha free tronrany oily or greasy matter, or naphtha that will not stain letter-paper when dipped into it and dried.

'lhc parailine should be out into small pieces, and put into thenaphtha in an easily and tightly-closed vessel, and should then be well shaken or agitated. In this way, a saturated-cold solution may be quickly obtained without the use of heat.

It is best to use an excess of parafline in the naphtha, so as to have a saturated solution at about 7 0 Fahrenheit.

The fabrics or articles to be prepared are dipped into this solution, and, if necessary, are allowed to remain there some time. The length of time will depend upon the thickness and porosity of the material, but should be suificient to allow the solution to either penetrate thoroughly, if so desired, or the time may be so short as to allow the solution to penetrate only a. short distance from the surface.

The fabrics or articlesthus "reaterl are then removed, and dried byartitieial ornatural heat, or in a current of air, when the naphtha -evaporates and leaves the paper, cloth, or other article, filled withparaifine, and impervious to water.

I have found naphtha (including benzine and benzole) of very light gravity to be the most suitable solvent.

The best results are obtained by the use of refined paraiiine, but crude parafline may be used for many articles.

I do not claim the preparation of paper, or cloth, or other fabric, by the application of parafline in a melted stare.

What 1 claim as my invention, and desire to secure by Letters Patent, is--' The treatment of paper, cloth, cork, sponge,leather, and other similar felted or textile fabrics and porous substances, or articles made therefrom, by the application thereto of paraflfine in solution, substantially as described, for the purpose set forth.

. CHARLES TOPPAN.

Witnesses:

Onannns A. PHILmPs,

N. )N. STEARNS. 

